A protoc-style codegen for Minecraft Bedrock wire packets. Schemas are written in Python (read statically, never executed) and rendered to C++ through Jinja templates. CMake integration mirrors protobuf_generate.

Status: active design. Interfaces are subject to change.

A packet file is plain Python:

@packet(id=5)
class DisconnectPacket:
    reason: DisconnectFailReason = field(type=varint32, since=622)
    messages: DisconnectPacketMessages | None = field(type=Union)

See protocol/disconnect.py for the current state, and tests/ for usage examples.

cmake -S . -B build
cmake --build build

The build invokes the codegen on files under protocol/ and links the generated headers into libbedrock_protocol.